Samsung galaxy 2 connect to wifi is free to surf internet?

[mobileuse]

Hello, my mobile samsung galaxy ace 2 gt 18160 connect to a wifi, but is not working for surfing or for 'What's up' application unless I also click:Use packet data' which cost money to use.

 

[kenrivers]

These links may help, the second one is for another Samsung phone but may help.
http://www.livetechz.com/how-to-establish-connection-between-samsung-galaxy-ace-and-wirless-router.html
http://www.youtube.com/watch?v=UTnGssF356A

 

[Guest]

Remember to turn off mobile data, turn on Wi-Fi, open a internet browser, wait...